<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>拖放</title>
	<style>
	.a1{
		width:150px;
		height:150px;
		background: rgb(238, 238, 238);
		display:inline-block;
	}
	.a1:not:(:nth-child(2n-1)){
		margin-right:20px;
	}
	#tu{
		width:100px;
	}
	</style>
</head>
<body>
	<!-- <div class="a1"></div>
	<div class="a1"></div>
	<div class="a1"></div>
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	<div class="a1"></div>
	<div class="a1"></div>
	<div class="a1"></div> -->
	<!-- <img src="timg.jpg" id="tu" draggable="true"> -->
</body>
<script src="ab_jq.js"></script>
<script src="ab.js"></script>
</html>